Adnexal skin you know it

The human body is composed of various organs, skin is an important organ of the body, as a sophisticated and complex machines, like, there are essential parts, that is, adnexal skin.
Adnexal skin include: hair, sweat glands, sebaceous glands and the mean (toe) A.
Hair: normal neonatal skin surface, there are thin, short and soft lanugo, lanugo premature infants more immature. Full-term newborns than for adults in particular, soft hair, like fine silk, in premature infants immature hair finer, look like a cotton-like, one month after birth gradually take off, grow new hair, so hair loss is not a disease of neonatal . In addition, larger differences in the number of neonatal hair, some almost no hair, and some dense black hair, but this time the number of hair and color depth, not the characteristics of the hair after the decision, if just born without hair, but also do not have to worry of. Development of eyebrows and eyelashes are even worse, when the 3-5 year-old adults is similar, so no need to encourage eyebrow scratch.
Sebaceous glands: Health after the full body, head, forehead, nose, ears, chest and scapular region up to, also known as "sebum District." Sebaceous gland function in the fetal period has been relatively strong, and the skin at birth and there are many fat tires, which can also be yellow sebum, there are slightly smell the crust, that is, within the neonatal period skin fat oil outflow phenomenon This is prone to adolescent "pimple Zhuang", hair loss, such as excess fat is the same reason.
Sweat glands: sweat glands are the size of the points, and gradually increased with age and development to improve. More than full-term newborns 3-5 days after birth, in the face and trunk only to see the sweat, and premature infants to 2-3 weeks before the start sweating, sweating palms and soles later.
Means (toe) A: full-term birth has been a long time to refer to (toe) end of preterm premature infants often fail to refer to (toe) side.